$ git clone -n https://src.fedoraproject.org/rpms/seahorse-adventures.git /var/lib/mock/f45-build-35794-699/root/chroot_tmpdir/scmroot/seahorse-adventures
Cloning into '/var/lib/mock/f45-build-35794-699/root/chroot_tmpdir/scmroot/seahorse-adventures'...
$ git fetch origin 290b7d7e275872976273af883bd7a11bdda09ee8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/seahorse-adventures
 * [new ref]         290b7d7e275872976273af883bd7a11bdda09ee8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 290b7d7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild