$ git clone -n https://src.fedoraproject.org/rpms/golang-github-burntsushi-toml.git /var/lib/mock/f42-build-side-1-3537117-46559/root/chroot_tmpdir/scmroot/golang-github-burntsushi-toml
Cloning into '/var/lib/mock/f42-build-side-1-3537117-46559/root/chroot_tmpdir/scmroot/golang-github-burntsushi-toml'...
$ git fetch origin a81a85cf4abdfea278417aa5d75f7d058861c1ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-burntsushi-toml
 * [new ref]         a81a85cf4abdfea278417aa5d75f7d058861c1ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a81a85c golang-github-burntsushi-toml: 1.5.0 version