$ git clone -n https://src.fedoraproject.org/rpms/bontmia.git /var/lib/mock/f41-build-1271081-23110/root/chroot_tmpdir/scmroot/bontmia
Cloning into '/var/lib/mock/f41-build-1271081-23110/root/chroot_tmpdir/scmroot/bontmia'...
$ git fetch origin 01fd1ac08513e4388d5e2fc4b3fdee5cb1402a28:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bontmia
 * [new ref]         01fd1ac08513e4388d5e2fc4b3fdee5cb1402a28 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 01fd1ac Minor fixes