$ git clone -n https://src.fedoraproject.org/rpms/seamonkey.git /var/lib/mock/f39-build-2567842-62096/root/chroot_tmpdir/scmroot/seamonkey
Cloning into '/var/lib/mock/f39-build-2567842-62096/root/chroot_tmpdir/scmroot/seamonkey'...
$ git fetch origin 740792c59d91d7eae1d4a98e88715e8a2f5e2484:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/seamonkey
 * [new ref]         740792c59d91d7eae1d4a98e88715e8a2f5e2484 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 740792c Update to 2.53.18.1