$ git clone -n https://src.fedoraproject.org/rpms/shared-mime-info.git /var/lib/mock/f40-build-2645117-66533/root/chroot_tmpdir/scmroot/shared-mime-info
Cloning into '/var/lib/mock/f40-build-2645117-66533/root/chroot_tmpdir/scmroot/shared-mime-info'...
$ git fetch origin 12923d05d410ba54694756677da714fb302896bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/shared-mime-info
 * [new ref]         12923d05d410ba54694756677da714fb302896bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12923d0 Rename firefox desktop filename