$ git clone -n https://git.cclinux.org/stage/rpms/rear.git /var/lib/mock/dist-circle8-build-110333-66604/root/chroot_tmpdir/scmroot/rear
Cloning into '/var/lib/mock/dist-circle8-build-110333-66604/root/chroot_tmpdir/scmroot/rear'...
$ git fetch origin 1ff54b08ca3f90c6ce52a2535361ea68c1c2da41:KOJI_FETCH_HEAD
From https://git.cclinux.org/stage/rpms/rear
 * [new ref]         1ff54b08ca3f90c6ce52a2535361ea68c1c2da41 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ff54b0 import rear-2.6-10.el8