$ git clone -n https://src.fedoraproject.org/rpms/perl-Text-Markdown.git /var/lib/mock/f45-build-27043-620/root/chroot_tmpdir/scmroot/perl-Text-Markdown
Cloning into '/var/lib/mock/f45-build-27043-620/root/chroot_tmpdir/scmroot/perl-Text-Markdown'...
$ git fetch origin faa6887f60a2f5d6db90df0b92b65d7c23992f31:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Text-Markdown
 * [new ref]         faa6887f60a2f5d6db90df0b92b65d7c23992f31 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at faa6887 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild