$ git clone -n https://git.cclinux.org/stage/rpms/vulkan-loader.git /var/lib/mock/dist-circle9-build-120519-85192/root/chroot_tmpdir/scmroot/vulkan-loader
Cloning into '/var/lib/mock/dist-circle9-build-120519-85192/root/chroot_tmpdir/scmroot/vulkan-loader'...
$ git fetch origin c9bebc10dd1774ec473b1e5197f6a2d1702e49a9:KOJI_FETCH_HEAD
From https://git.cclinux.org/stage/rpms/vulkan-loader
 * [new ref]         c9bebc10dd1774ec473b1e5197f6a2d1702e49a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9bebc1 import vulkan-loader-1.3.268.0-1.el9