$ git clone -n https://src.fedoraproject.org/rpms/seahorse.git /var/lib/mock/f45-build-35790-699/root/chroot_tmpdir/scmroot/seahorse
Cloning into '/var/lib/mock/f45-build-35790-699/root/chroot_tmpdir/scmroot/seahorse'...
$ git fetch origin a22b5fd438413d048199639cc821d0897d58a32b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/seahorse
 * [new ref]         a22b5fd438413d048199639cc821d0897d58a32b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a22b5fd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild