$ git clone -n https://src.fedoraproject.org/rpms/pthsem.git /var/lib/mock/f40-build-2696464-69662/root/chroot_tmpdir/scmroot/pthsem
Cloning into '/var/lib/mock/f40-build-2696464-69662/root/chroot_tmpdir/scmroot/pthsem'...
$ git fetch origin c5f6cf0726b455ddf7fd7b217f07df9715d68ba3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pthsem
 * [new ref]         c5f6cf0726b455ddf7fd7b217f07df9715d68ba3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5f6cf0 Retired: Long term failure to build