$ git clone -n https://src.fedoraproject.org/rpms/golang-github-pkg-sftp.git /var/lib/mock/f40-build-1517592-23912/root/chroot_tmpdir/scmroot/golang-github-pkg-sftp
Cloning into '/var/lib/mock/f40-build-1517592-23912/root/chroot_tmpdir/scmroot/golang-github-pkg-sftp'...
$ git fetch origin 4ed82e9c81eae25edc8e81ac8ca2a13c1583d76d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-pkg-sftp
 * [new ref]         4ed82e9c81eae25edc8e81ac8ca2a13c1583d76d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ed82e9 Update to 1.13.6 - Closes rhbz#2231630