$ git clone -n https://src.fedoraproject.org/rpms/gnome-shell.git /var/lib/mock/f40-build-764285-122906/root/chroot_tmpdir/scmroot/gnome-shell
Cloning into '/var/lib/mock/f40-build-764285-122906/root/chroot_tmpdir/scmroot/gnome-shell'...
$ git reset --hard 8033f5dd4151e1641e82df58d0de67868c735fbd
HEAD is now at 8033f5d Update to 45.2