$ git clone -n https://src.fedoraproject.org/rpms/libmodulemd.git /var/lib/mock/f40-build-733758-105395/root/chroot_tmpdir/scmroot/libmodulemd
Cloning into '/var/lib/mock/f40-build-733758-105395/root/chroot_tmpdir/scmroot/libmodulemd'...
$ git fetch origin 3ea1c45a241890d60a967e765b4379d45bac1486:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmodulemd
 * [new ref]         3ea1c45a241890d60a967e765b4379d45bac1486 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ea1c45 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild