$ git clone -n https://src.fedoraproject.org/rpms/perl-DateTime-Format-Mail.git /var/lib/mock/f45-build-22989-595/root/chroot_tmpdir/scmroot/perl-DateTime-Format-Mail
Cloning into '/var/lib/mock/f45-build-22989-595/root/chroot_tmpdir/scmroot/perl-DateTime-Format-Mail'...
$ git fetch origin ea107eecc1e13ea14e25a08d114290f827bd2f3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DateTime-Format-Mail
 * [new ref]         ea107eecc1e13ea14e25a08d114290f827bd2f3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea107ee Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild