$ git clone -n https://src.fedoraproject.org/rpms/mupen64plus.git /var/lib/mock/f39-build-2542963-61806/root/chroot_tmpdir/scmroot/mupen64plus
Cloning into '/var/lib/mock/f39-build-2542963-61806/root/chroot_tmpdir/scmroot/mupen64plus'...
$ git fetch origin 61e583ab536a56b5b3a7e67844114f6502c19270:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mupen64plus
 * [new ref]         61e583ab536a56b5b3a7e67844114f6502c19270 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 61e583a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild