$ git clone -n https://src.fedoraproject.org/rpms/gnome-software.git /var/lib/mock/f42-build-side-1-3537723-46560/root/chroot_tmpdir/scmroot/gnome-software
Cloning into '/var/lib/mock/f42-build-side-1-3537723-46560/root/chroot_tmpdir/scmroot/gnome-software'...
$ git fetch origin d2ad18c7f400ab377ffef90c934d975485d651e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-software
 * [new ref]         d2ad18c7f400ab377ffef90c934d975485d651e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2ad18c Update to 48.2