$ git clone -n https://src.fedoraproject.org/rpms/perl-Regexp-Assemble-Compressed.git /var/lib/mock/f45-build-25999-614/root/chroot_tmpdir/scmroot/perl-Regexp-Assemble-Compressed
Cloning into '/var/lib/mock/f45-build-25999-614/root/chroot_tmpdir/scmroot/perl-Regexp-Assemble-Compressed'...
$ git fetch origin 4c5320fffc8643ee1851a0c40e9a192b5f484026:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Regexp-Assemble-Compressed
 * [new ref]         4c5320fffc8643ee1851a0c40e9a192b5f484026 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c5320f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild