$ git clone -n https://src.fedoraproject.org/rpms/libretro-mgba.git /var/lib/mock/f45-build-16887-493/root/chroot_tmpdir/scmroot/libretro-mgba
Cloning into '/var/lib/mock/f45-build-16887-493/root/chroot_tmpdir/scmroot/libretro-mgba'...
$ git fetch origin f1ae859c25167f87b6ac4df1e54a35ec180aed23:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libretro-mgba
 * [new ref]         f1ae859c25167f87b6ac4df1e54a35ec180aed23 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f1ae859 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild