$ git clone -n https://src.fedoraproject.org/rpms/kf5-mailcommon.git /var/lib/mock/f39-build-2102794-50553/root/chroot_tmpdir/scmroot/kf5-mailcommon
Cloning into '/var/lib/mock/f39-build-2102794-50553/root/chroot_tmpdir/scmroot/kf5-mailcommon'...
$ git fetch origin 281f3911b41073f3691018c54a26e20b1a9e6d87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-mailcommon
 * [new ref]         281f3911b41073f3691018c54a26e20b1a9e6d87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 281f391 23.08.4