$ git clone -n https://src.fedoraproject.org/rpms/perl-DB_File-Lock.git /var/lib/mock/f41-build-1286848-23288/root/chroot_tmpdir/scmroot/perl-DB_File-Lock
Cloning into '/var/lib/mock/f41-build-1286848-23288/root/chroot_tmpdir/scmroot/perl-DB_File-Lock'...
$ git fetch origin c4f1bf1b539728f13a88533718c16fd483849f8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DB_File-Lock
 * [new ref]         c4f1bf1b539728f13a88533718c16fd483849f8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4f1bf1 Eliminate use of obsolete %patchN syntax (#2283636)