$ git clone -n https://src.fedoraproject.org/rpms/perl-Socket-MsgHdr.git /var/lib/mock/f45-build-26236-616/root/chroot_tmpdir/scmroot/perl-Socket-MsgHdr
Cloning into '/var/lib/mock/f45-build-26236-616/root/chroot_tmpdir/scmroot/perl-Socket-MsgHdr'...
$ git fetch origin f110e7a21d569c86f3cc7d71dabe2378431e35bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Socket-MsgHdr
 * [new ref]         f110e7a21d569c86f3cc7d71dabe2378431e35bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f110e7a Update to 0.06