$ git clone -n https://src.fedoraproject.org/rpms/mimetic.git /var/lib/mock/f41-build-1037576-18804/root/chroot_tmpdir/scmroot/mimetic
Cloning into '/var/lib/mock/f41-build-1037576-18804/root/chroot_tmpdir/scmroot/mimetic'...
$ git fetch origin c45a7e1c3daaa9e85884c3e0cd9b77f2c67be0ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mimetic
 * [new ref]         c45a7e1c3daaa9e85884c3e0cd9b77f2c67be0ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c45a7e1 Eliminate use of obsolete %patchN syntax (#2283636)