$ git clone -n https://src.fedoraproject.org/rpms/tktray.git /var/lib/mock/f45-build-37228-712/root/chroot_tmpdir/scmroot/tktray
Cloning into '/var/lib/mock/f45-build-37228-712/root/chroot_tmpdir/scmroot/tktray'...
$ git fetch origin cdf978160157fbcf854e7b4a296c43d40a1d798a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tktray
 * [new ref]         cdf978160157fbcf854e7b4a296c43d40a1d798a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cdf9781 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild