$ git clone -n https://src.fedoraproject.org/rpms/tslib.git /var/lib/mock/f41-build-1042116-18998/root/chroot_tmpdir/scmroot/tslib
Cloning into '/var/lib/mock/f41-build-1042116-18998/root/chroot_tmpdir/scmroot/tslib'...
$ git fetch origin 9481c2a82488859a590e0face66f5539d8247cb1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tslib
 * [new ref]         9481c2a82488859a590e0face66f5539d8247cb1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9481c2a Eliminate use of obsolete %patchN syntax (#2283636)