$ git clone -n https://src.fedoraproject.org/rpms/golang-github-boltdb-bolt.git /var/lib/mock/f41-build-side-1-2811784-32932/root/chroot_tmpdir/scmroot/golang-github-boltdb-bolt
Cloning into '/var/lib/mock/f41-build-side-1-2811784-32932/root/chroot_tmpdir/scmroot/golang-github-boltdb-bolt'...
$ git fetch origin f43b6bac150555df3eed9bf4cfce0500a28c4f1f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-boltdb-bolt
 * [new ref]         f43b6bac150555df3eed9bf4cfce0500a28c4f1f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f43b6ba Old binary is not required anymore