$ git clone -n https://src.fedoraproject.org/rpms/libretro-prosystem.git /var/lib/mock/f40-build-2672747-67544/root/chroot_tmpdir/scmroot/libretro-prosystem
Cloning into '/var/lib/mock/f40-build-2672747-67544/root/chroot_tmpdir/scmroot/libretro-prosystem'...
$ git fetch origin 91e3e217a611c70a7286a61f1cb1d743ad30b10d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libretro-prosystem
 * [new ref]         91e3e217a611c70a7286a61f1cb1d743ad30b10d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91e3e21 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild