$ git clone -n https://src.fedoraproject.org/rpms/ghc-yesod-core.git /var/lib/mock/f39-build-2512825-61701/root/chroot_tmpdir/scmroot/ghc-yesod-core
Cloning into '/var/lib/mock/f39-build-2512825-61701/root/chroot_tmpdir/scmroot/ghc-yesod-core'...
$ git fetch origin a410558be4435cee33f830b5f5605f7736d02ebd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-yesod-core
 * [new ref]         a410558be4435cee33f830b5f5605f7736d02ebd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a410558 https://hackage.haskell.org/package/yesod-core-1.6.24.3/changelog