$ git clone -n https://git.cclinux.org/stage/rpms/libserf.git /var/lib/mock/dist-circle9-build-120319-84997/root/chroot_tmpdir/scmroot/libserf
Cloning into '/var/lib/mock/dist-circle9-build-120319-84997/root/chroot_tmpdir/scmroot/libserf'...
$ git fetch origin 451e11f5ddb6741098de60e6254f0d4e1415d3b3:KOJI_FETCH_HEAD
From https://git.cclinux.org/stage/rpms/libserf
 * [new ref]         451e11f5ddb6741098de60e6254f0d4e1415d3b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 451e11f import libserf-1.3.9-27.el9