$ git clone -n https://src.fedoraproject.org/rpms/roundcubemail.git /var/lib/mock/f45-build-34645-690/root/chroot_tmpdir/scmroot/roundcubemail
Cloning into '/var/lib/mock/f45-build-34645-690/root/chroot_tmpdir/scmroot/roundcubemail'...
$ git fetch origin 8d2a941fd2e7a94967c36218ea384b322b0fe89b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/roundcubemail
 * [new ref]         8d2a941fd2e7a94967c36218ea384b322b0fe89b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d2a941 v1.7.3