$ git clone -n https://git.cclinux.org/stage/rpms/rt-tests.git /var/lib/mock/dist-circle8-build-113659-74667/root/chroot_tmpdir/scmroot/rt-tests
Cloning into '/var/lib/mock/dist-circle8-build-113659-74667/root/chroot_tmpdir/scmroot/rt-tests'...
$ git fetch origin 60a7f1fa791d2cac84a54e24e01c9e88dc479394:KOJI_FETCH_HEAD
From https://git.cclinux.org/stage/rpms/rt-tests
 * [new ref]         60a7f1fa791d2cac84a54e24e01c9e88dc479394 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60a7f1f import rt-tests-2.6-3.el8