$ git clone -n https://git.cclinux.org/stage/rpms/gcc.git /var/lib/mock/dist-circle8_10-updates-build-115055-77842/root/chroot_tmpdir/scmroot/gcc
Cloning into '/var/lib/mock/dist-circle8_10-updates-build-115055-77842/root/chroot_tmpdir/scmroot/gcc'...
$ git fetch origin 92adb6ee66988a12e222dfdbe956793ff46ee11c:KOJI_FETCH_HEAD
From https://git.cclinux.org/stage/rpms/gcc
 * [new ref]         92adb6ee66988a12e222dfdbe956793ff46ee11c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92adb6e import gcc-8.5.0-22.el8_10