$ git clone -n https://src.fedoraproject.org/rpms/adwaita-icon-theme.git /var/lib/mock/f45-build-6540-349/root/chroot_tmpdir/scmroot/adwaita-icon-theme
Cloning into '/var/lib/mock/f45-build-6540-349/root/chroot_tmpdir/scmroot/adwaita-icon-theme'...
$ git fetch origin de78e1bab36606cabefd01a3bf15e083ad506807:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/adwaita-icon-theme
 * [new ref]         de78e1bab36606cabefd01a3bf15e083ad506807 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de78e1b Update to 51.beta