$ git clone -n https://src.fedoraproject.org/rpms/screenie-composer.git /var/lib/mock/f45-build-35703-698/root/chroot_tmpdir/scmroot/screenie-composer
Cloning into '/var/lib/mock/f45-build-35703-698/root/chroot_tmpdir/scmroot/screenie-composer'...
$ git fetch origin fcc81857745fd82685670ddc565914a9b67fff7b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/screenie-composer
 * [new ref]         fcc81857745fd82685670ddc565914a9b67fff7b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fcc8185 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild