$ git clone -n https://src.fedoraproject.org/rpms/perl-Compress-Raw-Zlib.git /var/lib/mock/f45-build-22460-591/root/chroot_tmpdir/scmroot/perl-Compress-Raw-Zlib
Cloning into '/var/lib/mock/f45-build-22460-591/root/chroot_tmpdir/scmroot/perl-Compress-Raw-Zlib'...
$ git fetch origin c90abf8be5ec21fd02d991354acc5fc9bd2899b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Compress-Raw-Zlib
 * [new ref]         c90abf8be5ec21fd02d991354acc5fc9bd2899b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c90abf8 2.224 bump (rhbz#2525604)