$ git clone -n https://src.fedoraproject.org/rpms/ghc-skein.git /var/lib/mock/f45-build-10754-424/root/chroot_tmpdir/scmroot/ghc-skein
Cloning into '/var/lib/mock/f45-build-10754-424/root/chroot_tmpdir/scmroot/ghc-skein'...
$ git fetch origin 8a68bb43b96fb113a24dc748994e7c5c464dc9bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-skein
 * [new ref]         8a68bb43b96fb113a24dc748994e7c5c464dc9bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a68bb4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild