$ git clone -n https://src.fedoraproject.org/rpms/perl-Regexp-Assemble.git /var/lib/mock/f45-build-26052-614/root/chroot_tmpdir/scmroot/perl-Regexp-Assemble
Cloning into '/var/lib/mock/f45-build-26052-614/root/chroot_tmpdir/scmroot/perl-Regexp-Assemble'...
$ git fetch origin 7a2ef71e07b40aaa7a19eac2a2a9156f08c3a179:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Regexp-Assemble
 * [new ref]         7a2ef71e07b40aaa7a19eac2a2a9156f08c3a179 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a2ef71 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild