$ git clone -n https://src.fedoraproject.org/rpms/libretro-nestopia.git /var/lib/mock/f45-build-16901-493/root/chroot_tmpdir/scmroot/libretro-nestopia
Cloning into '/var/lib/mock/f45-build-16901-493/root/chroot_tmpdir/scmroot/libretro-nestopia'...
$ git fetch origin ab1651f4b15b07dd7c886dd91663e007f0edbafb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libretro-nestopia
 * [new ref]         ab1651f4b15b07dd7c886dd91663e007f0edbafb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab1651f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild