$ git clone -n https://src.fedoraproject.org/rpms/golang-github-exchange-interface.git /var/lib/mock/f38-build-side-42-init-devel-1036319-29747/root/chroot_tmpdir/scmroot/golang-github-exchange-interface
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1036319-29747/root/chroot_tmpdir/scmroot/golang-github-exchange-interface'...
$ git fetch origin 1db86b48590094ff23d809d824583aac2c0ca1d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-exchange-interface
 * [new ref]         1db86b48590094ff23d809d824583aac2c0ca1d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1db86b4 Added the README