$ git clone -n https://src.fedoraproject.org/rpms/gnome-keyring.git /var/lib/mock/f40-build-1999069-44299/root/chroot_tmpdir/scmroot/gnome-keyring
Cloning into '/var/lib/mock/f40-build-1999069-44299/root/chroot_tmpdir/scmroot/gnome-keyring'...
$ git fetch origin 4952be7e35a225879332e4ae16744cbd038d3069:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-keyring
 * [new ref]         4952be7e35a225879332e4ae16744cbd038d3069 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4952be7 Use standard whitespace