$ git clone -n https://src.fedoraproject.org/rpms/golang-github-gdamore-tcell-2.git /var/lib/mock/f40-build-2246043-53799/root/chroot_tmpdir/scmroot/golang-github-gdamore-tcell-2
Cloning into '/var/lib/mock/f40-build-2246043-53799/root/chroot_tmpdir/scmroot/golang-github-gdamore-tcell-2'...
$ git fetch origin 371d8cc0ab199fde9ee11cc4d00dfb753d285e10:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-gdamore-tcell-2
 * [new ref]         371d8cc0ab199fde9ee11cc4d00dfb753d285e10 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 371d8cc Update to latest version (#2254098)