$ git clone -n https://src.fedoraproject.org/rpms/copr-frontend.git /var/lib/mock/f40-build-2708450-71497/root/chroot_tmpdir/scmroot/copr-frontend
Cloning into '/var/lib/mock/f40-build-2708450-71497/root/chroot_tmpdir/scmroot/copr-frontend'...
$ git fetch origin 1b6c4470c806a44e3a2068f2b8bb718f1544d5f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/copr-frontend
 * [new ref]         1b6c4470c806a44e3a2068f2b8bb718f1544d5f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1b6c447 Update copr-frontend to 1.205-1