$ git clone -n https://src.fedoraproject.org/rpms/perl-Compress-Raw-Lzma.git /var/lib/mock/f41-build-816990-150570/root/chroot_tmpdir/scmroot/perl-Compress-Raw-Lzma
Cloning into '/var/lib/mock/f41-build-816990-150570/root/chroot_tmpdir/scmroot/perl-Compress-Raw-Lzma'...
$ git fetch origin 7366c3842906232aea0f9c0620f3ad2b1767f53d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Compress-Raw-Lzma
 * [new ref]         7366c3842906232aea0f9c0620f3ad2b1767f53d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7366c38 Rebuild against xz 5.6.2