$ git clone -n https://src.fedoraproject.org/rpms/libretro-gambatte.git /var/lib/mock/f45-build-16881-493/root/chroot_tmpdir/scmroot/libretro-gambatte
Cloning into '/var/lib/mock/f45-build-16881-493/root/chroot_tmpdir/scmroot/libretro-gambatte'...
$ git fetch origin fce1a46eb4a25e826abb329540a115aa64e4ed59:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libretro-gambatte
 * [new ref]         fce1a46eb4a25e826abb329540a115aa64e4ed59 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fce1a46 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild