$ git clone -n https://src.fedoraproject.org/rpms/libmpc.git /var/lib/mock/f40-build-730582-103522/root/chroot_tmpdir/scmroot/libmpc
Cloning into '/var/lib/mock/f40-build-730582-103522/root/chroot_tmpdir/scmroot/libmpc'...
$ git fetch origin 892aceddfe7be79b6b3b18008f2b227f955cdd77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmpc
 * [new ref]         892aceddfe7be79b6b3b18008f2b227f955cdd77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 892aced Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild