$ git clone -n https://src.fedoraproject.org/rpms/libcgi.git /var/lib/mock/f45-build-15984-481/root/chroot_tmpdir/scmroot/libcgi
Cloning into '/var/lib/mock/f45-build-15984-481/root/chroot_tmpdir/scmroot/libcgi'...
$ git fetch origin 3ce09edee9b032298678fe80afbd6c078a314ac2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcgi
 * [new ref]         3ce09edee9b032298678fe80afbd6c078a314ac2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ce09ed Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild