$ git clone -n https://src.fedoraproject.org/rpms/bsp.git /var/lib/mock/f41-build-1034396-18630/root/chroot_tmpdir/scmroot/bsp
Cloning into '/var/lib/mock/f41-build-1034396-18630/root/chroot_tmpdir/scmroot/bsp'...
$ git fetch origin 04ef4d50732f8ffdbd7fd5bb021ae1403de11a5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bsp
 * [new ref]         04ef4d50732f8ffdbd7fd5bb021ae1403de11a5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04ef4d5 Eliminate use of obsolete %patchN syntax (#2283636)