$ git clone -n https://src.fedoraproject.org/rpms/kf5-messagelib.git /var/lib/mock/f39-test-2569576-62238/root/chroot_tmpdir/scmroot/kf5-messagelib
Cloning into '/var/lib/mock/f39-test-2569576-62238/root/chroot_tmpdir/scmroot/kf5-messagelib'...
$ git fetch origin 176d7d921e7a43fde41000b978ef28b73099c8a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-messagelib
 * [new ref]         176d7d921e7a43fde41000b978ef28b73099c8a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 176d7d9 23.08.5