$ git clone -n https://src.fedoraproject.org/rpms/gnome-shell-extension-pop-shell.git /var/lib/mock/f45-build-11540-432/root/chroot_tmpdir/scmroot/gnome-shell-extension-pop-shell
Cloning into '/var/lib/mock/f45-build-11540-432/root/chroot_tmpdir/scmroot/gnome-shell-extension-pop-shell'...
$ git fetch origin 7e03d701b7ecfbac20b20c5e3a71fc722b493d7e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-shell-extension-pop-shell
 * [new ref]         7e03d701b7ecfbac20b20c5e3a71fc722b493d7e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e03d70 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild