$ git clone -n https://src.fedoraproject.org/rpms/distribution-gpg-keys.git /var/lib/mock/f41-build-922304-17111/root/chroot_tmpdir/scmroot/distribution-gpg-keys
Cloning into '/var/lib/mock/f41-build-922304-17111/root/chroot_tmpdir/scmroot/distribution-gpg-keys'...
$ git fetch origin a4e74917cf989503ea0b838cf2e0d04330bdab7a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/distribution-gpg-keys
 * [new ref]         a4e74917cf989503ea0b838cf2e0d04330bdab7a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a4e7491 Update distribution-gpg-keys to 1.104-1