$ git clone -n https://src.fedoraproject.org/rpms/fedora-jam-kde-theme.git /var/lib/mock/f45-build-8860-396/root/chroot_tmpdir/scmroot/fedora-jam-kde-theme
Cloning into '/var/lib/mock/f45-build-8860-396/root/chroot_tmpdir/scmroot/fedora-jam-kde-theme'...
$ git fetch origin 92ec468573e03e898152d3b118cb92d6485e208f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fedora-jam-kde-theme
 * [new ref]         92ec468573e03e898152d3b118cb92d6485e208f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92ec468 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild