$ git clone -n https://src.fedoraproject.org/rpms/mediaconch.git /var/lib/mock/f38-build-side-42-init-devel-780435-27892/root/chroot_tmpdir/scmroot/mediaconch
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-780435-27892/root/chroot_tmpdir/scmroot/mediaconch'...
$ git fetch origin 1036345321505ecf09855014e836732fde8deb90:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mediaconch
 * [new ref]         1036345321505ecf09855014e836732fde8deb90 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1036345 Add source file.