$ git clone -n https://src.fedoraproject.org/rpms/kblocks.git /var/lib/mock/f45-build-14616-462/root/chroot_tmpdir/scmroot/kblocks
Cloning into '/var/lib/mock/f45-build-14616-462/root/chroot_tmpdir/scmroot/kblocks'...
$ git fetch origin 05cef86de1cf5c3a2506d2de14465adeb9a0b041:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kblocks
 * [new ref]         05cef86de1cf5c3a2506d2de14465adeb9a0b041 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05cef86 26.08.1