$ git clone -n https://src.fedoraproject.org/rpms/gshhg-gmt-nc4.git /var/lib/mock/f45-build-13075-446/root/chroot_tmpdir/scmroot/gshhg-gmt-nc4
Cloning into '/var/lib/mock/f45-build-13075-446/root/chroot_tmpdir/scmroot/gshhg-gmt-nc4'...
$ git fetch origin 1c404b725d85b8096caadf7dc69e2be713049a2a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gshhg-gmt-nc4
 * [new ref]         1c404b725d85b8096caadf7dc69e2be713049a2a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c404b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild