$ git clone -n https://src.fedoraproject.org/rpms/mustache.git /var/lib/mock/f45-build-19330-547/root/chroot_tmpdir/scmroot/mustache
Cloning into '/var/lib/mock/f45-build-19330-547/root/chroot_tmpdir/scmroot/mustache'...
$ git fetch origin bac9f290da3fe3d588425719aa823dfdd71e1d9f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mustache
 * [new ref]         bac9f290da3fe3d588425719aa823dfdd71e1d9f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bac9f29 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild