$ git clone -n https://src.fedoraproject.org/rpms/koji-osbuild.git /var/lib/mock/f41-build-side-1-3134079-39716/root/chroot_tmpdir/scmroot/koji-osbuild
Cloning into '/var/lib/mock/f41-build-side-1-3134079-39716/root/chroot_tmpdir/scmroot/koji-osbuild'...
$ git fetch origin 650a8de023018775b44458e596e1b0fc37b74cc2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/koji-osbuild
 * [new ref]         650a8de023018775b44458e596e1b0fc37b74cc2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 650a8de Update to 12 upstream release