$ git clone -n https://src.fedoraproject.org/rpms/gtk4-layer-shell.git /var/lib/mock/f45-build-13185-447/root/chroot_tmpdir/scmroot/gtk4-layer-shell
Cloning into '/var/lib/mock/f45-build-13185-447/root/chroot_tmpdir/scmroot/gtk4-layer-shell'...
$ git fetch origin caa1607097d7bd03605b5c8ece17e2b239e79f44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtk4-layer-shell
 * [new ref]         caa1607097d7bd03605b5c8ece17e2b239e79f44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at caa1607 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild