$ git clone -n https://src.fedoraproject.org/rpms/perl-Date-Holidays-DE.git /var/lib/mock/f45-build-22991-595/root/chroot_tmpdir/scmroot/perl-Date-Holidays-DE
Cloning into '/var/lib/mock/f45-build-22991-595/root/chroot_tmpdir/scmroot/perl-Date-Holidays-DE'...
$ git fetch origin 72f5585bc408ab793c47204bec8c4294932c799e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Date-Holidays-DE
 * [new ref]         72f5585bc408ab793c47204bec8c4294932c799e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 72f5585 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild