$ git clone -n https://src.fedoraproject.org/rpms/mailcommon.git /var/lib/mock/f42-build-side-1-3517015-46096/root/chroot_tmpdir/scmroot/mailcommon
Cloning into '/var/lib/mock/f42-build-side-1-3517015-46096/root/chroot_tmpdir/scmroot/mailcommon'...
$ git fetch origin feeab40c7c87c537239d05a6ec367b5657ddd081:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mailcommon
 * [new ref]         feeab40c7c87c537239d05a6ec367b5657ddd081 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at feeab40 25.04.0