$ git clone -n https://src.fedoraproject.org/rpms/merkuro.git /var/lib/mock/f41-build-853972-166804/root/chroot_tmpdir/scmroot/merkuro
Cloning into '/var/lib/mock/f41-build-853972-166804/root/chroot_tmpdir/scmroot/merkuro'...
$ git fetch origin 519ebd446ae088d7e1d923f062b49aaaa29d9f40:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/merkuro
 * [new ref]         519ebd446ae088d7e1d923f062b49aaaa29d9f40 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 519ebd4 Clarified the nature of the patch