$ git clone -n https://src.fedoraproject.org/rpms/python-blivet.git /var/lib/mock/f45-build-29821-641/root/chroot_tmpdir/scmroot/python-blivet
Cloning into '/var/lib/mock/f45-build-29821-641/root/chroot_tmpdir/scmroot/python-blivet'...
$ git fetch origin aa398473baa1d15f96810673e8ea9dc40d8743ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-blivet
 * [new ref]         aa398473baa1d15f96810673e8ea9dc40d8743ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa39847 Drop the libparted device cache even if the device node is gone