$ git clone -n https://src.fedoraproject.org/rpms/gvfs.git /var/lib/mock/f45-build-13262-448/root/chroot_tmpdir/scmroot/gvfs
Cloning into '/var/lib/mock/f45-build-13262-448/root/chroot_tmpdir/scmroot/gvfs'...
$ git fetch origin f91c75e9029154a0f7ffe1c70ec4c65f5116f0ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gvfs
 * [new ref]         f91c75e9029154a0f7ffe1c70ec4c65f5116f0ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f91c75e Update to 1.61.91