$ git clone -n https://src.fedoraproject.org/rpms/mp3gain.git /var/lib/mock/f40-build-790478-136595/root/chroot_tmpdir/scmroot/mp3gain
Cloning into '/var/lib/mock/f40-build-790478-136595/root/chroot_tmpdir/scmroot/mp3gain'...
$ git fetch origin bb9deb8fb3ba972b4f004a7bc22f2275fdef9dd3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mp3gain
 * [new ref]         bb9deb8fb3ba972b4f004a7bc22f2275fdef9dd3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb9deb8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild